Cement-block-molding machine.



L. J. KALVIG. CEMENT BLOCK MOLDING MACHINEx APPLIGAIION run]: MAY 18, 1909.

Patented Aug. 9, 1910.

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7, attouwgi Patented Aug. 9, 1910.

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o N N \N m MW v I n \QKN R my} M m N v i o I. f f u H WM aw 1 \h M u L. J. KALVIG.

CEMENT BLOCK MOLDING MACHINE.

APPLICATION FILED MAY 18, 1909.

Patented Aug. 9,1910.

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L. J. KALVIG. GBMEN T BLOCK MOLDING MACHINE. APPLICATION FILED MAY 18, 1909.

967,020. 7 Patented Aug. 9,1910.

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LEWIS J. KALVIG, OF BRITT, IOWA.

CEMENT-BLOCK-MOLDING MACHINE.

Specification of Letters Patent.

Patented A11 9, 1910.

Application filed May 18, 1909. Serial No. 496,764.

To all whom it may concern:

Be it known that I, LEWIS J. KALvIG, citizen of the United States,residing at Britt, in the county of Hancock and State of Iowa, have invented certain new and useful Improvements in Gement-Block-Molding Machines, of which the following is a specification.

My invention relates to machines for mold ing hollow concrete or cement blocks, and the object of my invention is to provide a machine which will permit the molding of the blocks with great celerity and exactness, and wherein the work may be very expedi' tiously accomplished and the working parts of the machine thoroughly protected from the cement or artificial stone.

For a full understanding of the invention and the merits thereof. and to acquire a knowledge of the details of construction, reference is to be had to the following description and accompanying drawings, in which:

Figure 1 is a perspective View of my machine with the mold box raised; Fig. 2 is a rear elevation partly in section; Fig. 3 is a transverse section on the line 3-3 of Fig. 2; Fig. 4 is a fragmentary transverse section on the line 4- 1 of Fig. 2; Fig. 5 is a perspective view of the mold box open, the ends of the box being provided with the peculiar end cores used for forming the block shown in Fig. 8; Fig. 6 is a longitudinal horizontal section of the mold box with the end cores shown in Fig. 5, this figure also showing the middle core just entering the box; Fig. 7 is a fragmentary section of one end of the mold box shown in Fig. 6, showing a tie rod in place and hooked to the end core; Fig. 8 is a perspective view of the two-piece block shown in Figs. 5, 6 and 7 Fig. 9 is a perspective view of another form of blockas made by the cores shown in Fig. 10; Fig. 10 is a perspective view of the mold box detached from the machine, and a fragmentary perspective of the central cores therefor; and, Fig. 11 is a vertical section of one end of the mold box shown in Fig. 10, with the end core therein.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Referring to the drawings, 2 designates a metal table cut away at its center, as at 3,

and supported upon the opposed end frames 4-.. These end frames are cast, and the edges of the same are at right angles with the main portion of the frames, so as to form legs and provide also for the attachment of the longituclinal opposed bracing castings 5. These end frames and the bracing castings may be made in any desired manner, though preferably as shown, and preferably of cast metal. Mounted in the rear margins of the end frames, is the longitudinal shaft 6 having a handle 7 at one end, and having attached thereto the opposed gear wheels 8. These gear wheels intermesh with vertically movable racks 9 whose upper ends carry the bifurcated socket 10 in which the mold box is pivotally supported, as will be later described. The rack bars 9 are held in engagement with the gear wheels '8 by means of the studs or rollers 11 which project from transverse crosspieces 12 which are riveted at their ends to the inwardly turned margins .of the endpieces 4. Preferably, there are two of these crosspieces 12 on each end of the machine.

Mounted in each end piece of the machine is a toothed gear 13 which meshes with an arcuate rack 14: which is carried by an arm 15 fast on a longitudinal shaft 16 having a handle 17 at one end. The gear wheels 13 engage with horizontal rack bars 18 which move outward and inward through openings 19 in the face of the end frames. Inwardly projecting studs 20 on the end frames contact w1th the upper face of the rack bars,

rearward of the gear wheels 13, and the rack bars forward of the gear wheels 13 are supported on idler pinions 31.

The forward ends of the rack bars carry the transverse supporting bar 22 to which is to be attached a central core box, as will be later described. It will be seen that the rack bars 9 constitute a vertically moving lifting means, and that the rack bars 18 constitute a horizontally moving means. The first rack bars act to support the mold box, and the second set of rack bars act to support the core of the mold box.

The mold box which is shown detached from the machine in Figs. 5 and 10, consists of the base plate 23, the rear plate 24, the front plate 25 and the opposed end plates 26. The front plate 25 is hinged at 27 to the base plate 23, and is provided with angular resilient plates 28 forming catches which are perforated to engage free studs 29 pro ecting from the end plates 26, so that the plate 25 shall normally be held engaged with the end plates. The base plate 23 is rigidly attached to the rear plate by the angle irons 30. It will thus be seen that the mold box may be opened almost entirely by disengaging the front plate and allowing it to fall, and by opening the end plates. This permits the easy detachment of the molded block from the mold box. The rear plate of the mold box is bent so as to form the op posed channels 31 for the attachment of a filling block 32 whose rear face is formed with the cleats 33 which enter these channels, thus holding the filling piece in place. In Fig. 5 I show my mold box as provided with cores such as are used for the purpose of making a two-part cement block, with a continuous air space from end to end. For this purpose end cores are used, each of which has a base 34 and the two converging sides 35. These cores are arranged across the mold box at right angles to the front plate 25. Each of the sides 35 is formed with notches 36 for the reception of anchor irons which hold the two portions of the block together after they are molded. The inner faces of the sides are provided with pivoted hooks 37 which are adapted to engage around the anchor irons 38 and hold the same in position against the end cores, while the lower portion of the block is being tamped into the mold. Attached to the transverse supporting bar 22 is the central core 39. This is box-like in form and is, as usual, slightly tapering. The cross bar 22 has upon it the plate 40 to which the core box is removably attached by screws or bolts 41. The form of core box shown in Fig. l is to be used with the peculiar form of endpieees just previously described, for the purpose ofmaking a two-part cement block. It will be seen that the core, when in position within the box, fits solidly against the ends of the end core flanges.

The core box is provided with the trunnions 42 which are adapted to rest in the sockets 10 on the racks 9. The upper edge of the core box is marginally flanged, as at 43, the ends of the box being also marginally flanged, but said flange being slightly arcuate in contour. It will thus be seen that when the mold box is in its closed position, it will fit down solidly upon the table 2 and close the opening 3 in the same, so that no cement or other like material can get down into the machinery below.

The operation of forming a cement block of a two-piece character such as before referred to, is as follows: The end cores 34 are placed in position and are held against the end pieces by any suitable means, as by the screws 44. Tie rods or anchor rods 38 are now placed in the notches 36 and are held in place by engaging them with the hooks 37. The material is now filled into the lower half of the mold box and is thoroughly tamped beneath the lower flanges 35 of the end cores 34. hen the mold is filled to the level of the lower flanges of the end cores, the lever 17 is operated, which through its areuate rack and the gear 13, operates the rack bars 18 to carry the central core into position through the opening 16 in the front plate 25 of the mold box. As the core enters the opening, it will strike the hooks 37 and will force them rearward, thus disengaging the hooks from the anchor irons 38. These irons, however, will be held rigidly in position by the core. After the central core has been forced inward to its full extent, the upper half of the mold is filled with the cementitious materials. \Vhen filled and sutficiently hardened, the middle core is withdrawn by operating the lever 17 and the mold box may be then raised above the table by operating the lever 7. \Vhen once raised above the table, the sides of the mold box may be opened to permit the easy removal of the block therefrom.

In Fig. 10 I show a mold box having cores of somewhat different form for molding a block of artificial stone, having two passages through its center and two channels on its ends. Of course for this purpose the front plate 25 previously described, is changed for a front plate 47. The front plate 47 has two openings 49 in place of the one opening 25 above referred to. The cores 49 are hollow tapered boxes adapted to be attached to the plate 40 on the cross bar 22. The end cores 50 are hollow and semicylindrical, the base of the core being adapted to be attached by screws to the end plates of the mold box.

I do not wish to be limited to the precise character of the molds and cores which I may use. I have illustrated two forms to show the adaptability of my invention to various uses, and I have found in practice that it is peculiarly adapted to the formation of cement blocks of the character described by the use of the cores shown.

My machine being provided with a table, prevents the gear wheels and other moving parts from becoming clogged by plaster, cement, or other granular or powdered material which may be used for the purpose of making the blocks.

It will be seen that all the process of filling the mold box with the plastic material and again discharging the contents of the mold box, is accomplished above the table.

It will also be seen that my machine is peculiarly adapted to the making of the twopieee cement blocks, by reason of the fact that the anchor rods are held in place therein, first by the hooks which are attached to the end cores, and second by the displacement of the hooks by the middle core and the holding of the anchor irons in place by said core as it displaces the hooks.

It will be seen that my invention is rela tively simple, is solidly made, and will perform the Work of inserting and removing the cores and lifting the mold box in convenient position for moving the completed blocks with celerity and despatch.

Having thus described the invention, what is claimed as new is 1. In a cement block molding machine, a frame, a table supported on the frame and having a central opening with a recessed margin, vertically movable uprights located at opposite ends of the opening in the table, mechanism mounted on the frame and located entirely below and housed by said table for moving said uprights, and a mold box detachablycarried upon the upper ends of the uprights and having hinged sides, the upper edgesof the sides being formed with outwardly projecting flanges adapted to be received within the recessed inner margin of the table when the mold box is in its lowered position.

2. In a block molding mechanism, a frame, vertically movable uprights on the frame, means for raising and lowering said uprights, a mold box pivotally mounted upon the upper ends of the uprights and having a core opening in one side thereof, a transversely sliding core carrier mounted in said frame, a core carried thereon, mechanism for reciprocating the carrier to move the core. into and out of the core opening of the box, and mechanism for raising and lowering the uprights.

3. In a block molding mechanism, a supporting frame, a table thereon having a central mold box opening, vertically movable uprights supported on the frame, mechanism for raising and lowering said up rights, a mold box pivotally mounted on the upper ends of the uprights, said mold box having a core opening in one side thereof, a horizontally reciprocating corecarrying frame, mechanism for reciprocating said frame, and core carried thereby, located beneath the table and adapted to be forced into the core opening of the mold box when the opening of the mold box is in its lowered position.

4. In a block molding mechanism, a frame, a table thereon having a central opening, a mold box movable into and out of said opening and having an opening in its side for the insertion of a core, vertically movable uprights at each end of the mold box upon which the mold box is pivotally and removably supported, mechanism located beneath the table and housed thereby for vertically reciprocating said uprights, a core supported table and to one side thereof, and mechanbeneath the level of the ism located beneath and housed by the table for transversely reciprocating the core to enter said mold box opening when the mold box is in its lowered position.

5. In a block molding mechanism, a supporting frame, a table thereon having a central mold box opening, a sliding core support mounted for movement in a horizontal plane, a core carried by said support beneath the table, mechanism for moving said core support horizontally, a mold box support vertically movable through the opening of said table, and a mold box therefor, said mold box comprising a bottom, a fixed side plate, a side plate hinged to the bottom, and end plates hinged to the bottom, one of said side plates being formed with a core opening.

6. In a block molding mechanism, a supporting frame, a table thereon having a central opening, vertically movable bars supported on said frame and adapted to move upward through said opening at either end thereof, means for raising and lowering said bars, a mold box pivotally and removably supported on the upper ends of said bars, said mold box having a core opening in one side, horizontally movable bars mounted in said frame below the table and connected by a crosspiece, a core mounted on said crosspiece and adapted to be inserted into the core opening of the mold box, and mechanism for transversely reciprocating said bars and the core supported thereon to move the core into or out of the mold box.

7. The combination with a mold box composed of a bottom, two ends and two opposed hinged sides, said ends being provided with trunnions and one of the hinged sides being formed with a core opening, of a frame, a table supported on the frame, said table being formed with a longitudinally extending opening in its center, mechanism located wholly beneath the table and housed thereby for raising and lowering the mold box out of and into the same, and mechanism located beneath the table and housed by the same for supporting a core below the level of the table and adapted to move horizontally to carry the core into or out of the core opening in the side of the mold box when the latter is in its lowered position.

8. The combination with a mold box, of end cores, means on the cores for detachably engaging with transversely disposed tie bars, and a central core movable into the mold box and adapted to release said tie bars from their engagement with the cores.

9. The combination with a mold box comprising opposed sides and opposed end pieces, one of said sides being formed with a core opening, of end cores attachable to the end pieces of said mold box, movable means on the cores for engaging with transverse tie bars, and a central core movable into and out of said opening and adapted to disengage the tie bars from the end cores or hold the tie bars in place.

10. The combination with a mold box, one of whose sides is formed with a core opening, of end cores adapted to be disposed in said mold box and having latches for engagement with transverse tie bars, and a central core movable through the core opening into the mold box and adapted to disengage said latches but to hold the tie rods in place against the end cores.

The combination with a mold box composed of hinged sections, of end cores attachable to the ends of the core box and composed of a plate having outwardly projecting converging flanges, said flanges being notched for the reception of tie rods, pivoted hooks on the inner faces of the flanges adapted to engage said tie rods to hold them in the notches,oand a core insertible through the core opening of said box and adapted to push back the hooks from engagement with the tie rods when the core is inserted.

12. In block molding mechanism, a supporting frame, a table, vertically movable uprights movable through a central opening in said table, a horizontally movable core-supporting frame located below the table, a center core supported thereon, and a mold box supported on said uprights for vertical movement therewith, said mold boX consisting of a bottom, opposed sidepieces and opposed endpieces, said pieces being hinged to each other, and end cores removably supported upon the endpieces of the mold box, each of said cores consisting of a plate having outwardly bent converging flanges, the edges of said flanges being notched for the reception of tie rods, and

hooks pivotally attached to the inside faces of the flanges and adapted to engage with said tie rods but to be moved out of engagement therewith by the inward movement of the central core.

13. In a block molding porting frame consisting a table mounted upon the a central opening adapted to receive a mol box, vertically movable rack bars supported on said frame and movable through the opening of the table and opposite ends of the same, a shaft supported in the frame having gear wheels engaging with the rack bars, a lever for rotating said shaft, opposed horizontally movable racks mounted in said frame, a cross bar connecting the same and located in a plane below the table, a core detachably mounted upon said cross bar, said core projecting inward, gears engaging with the horizontally moving rack bars, a handle for operating said gears, and amold box having trunnions removably supported on the upper ends of said vertical rack bars, said core box being adapted to fill the opening in the table, said mold -box comprising sides and endpieces hinged to each other, one of said sides having a core opening for the insertion of the core carried upon said horizontally moving rack bars, the ends of said core box being provided with detachable end cores, the upper edge of the core box being outwardly flanged to entirely close the in the table.

In testimony whereof I afiix presence of two witnesses.

LElVIS J. KALVIG. lVitnesses JAMES A. RENWICK, C. A. SMITH.

mechanism, a supof opposed sides, said frame l1LVlI1 my signature opening 

